Prepping my bike for a HIM on Saturday and was putting my race tires on. I should mention now that I hate (ok strong dislike) my stock Felt rims. Tires are a PITA to put on over the Felt rims. Here's the damage

I was mostly ranting but yes, pretty sure it's the rim. I can't blame the pinch flats on the rim, but definitely the difficulty in getting it off/on. My front is stock TTR3, the rear is a Mavic pro with my PT laced to it. Since buying the bike I have gone through 2 sets of race tires, Michelin Pro 3s and now Conti GP3ks. On both sets the front has always been nearly impossible to get the tire on/off. The rear, always fairly easy.

From a performance standpoint the TTR3's are ok. Not great, but not a ton to complain about. I just think that mine happen to be on the outer edge of mfg tolerance making it a pain to put tires on.